Bearing adjuster



Au 1L H325. 1,549,536

J. K. GREER BEARING ADJUSTER Filed Sept. 22, 192; 2 Sheds-Sheet 1 diff- 667 lNVENTUn ATTORNEY WIT NESS:

Aug. 11, 1925.

J. K. GREER BEARING ADJUSTER Filed Sept. 22, 1923 2 Sheets-Sheet 2 INVENTOR ATTORNEY WITNESS:

Patented Aug. 11, 1925.

UNITED STATES PATENT OFFICE.

BEARING ADJUSTER.

Application filed September 22, 1923. Serial No. 664,308.

To all whom it may concern:

Be it known that I, JACKSON K. GREEK, a. citizen of the United States, residing at Berner, in the county of Monroe and State of Georgia, have invented new and useful Improvements in Bearing Adjusters, of which the following is a specification.

This invention relates to means for ad justing magnetos of the type wherein the said magnetos are mounted upon the fly wheel of an internal combustion engine, as constructed in a well known make of automobile.

In the make of automobile referred to, the magneto magnets are mounted in the fly wheel of the engine, while the coils are fixably mounted upon the engine housing, so that in the event of longitudinal play developing in the engine crank shaft, the magnets will be capable of movement a sufficient distance from the coils to render starting of the engine difficult, or will seriously interfere with proper operation of the engine when the latter is running at low speed, or under a heavy load. In order to overcome this fault it is necessary to take down the engine and install new bearings.

The present invention overcomes this d-ifficulty by providing convenient and readily accessible means whereby the crank shaft may be longitudinally adjusted in accordance with the wear of the bearings, so as to maintain the magnets and coils in their proper relative positions.

With the above and other objects in View, the invention further includes the follow ing novel features and details of construction, to be hereinafter more fullydescribed, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings Figure 1 is a side elevation partly in section of an internal combustion engine with the invention applied thereto.

Figure 2 is an end view of the fan pulley.

Figure 3 is a sectional view of the same.

Figure 4c is a face view.

Figure 5 is a detail perspective view of one of the double bridge plates for the adjusting bolts.

Figure 6 is an end view of the fan pulley illustrating a further modification.

Figure 7 is a sectional view approximately on the line 11-11 of Figure 6.

Figure 8 is a sectional view taken at right angles to that disclosed in Figure 7.

Figure 9 is a face view of the pulley.

Referring in detail to the drawings wherein like characters of reference denote corresponding parts, the engine to which the invention is shown as applied is of the type used in the well known Ford automobiles wherein the magneto which is indicated at 10 has its magnets mounted upon the engine crank shaft 11, the main bearings of which are indicated at 12. In use, the bearings 12 frequently become quickly worn so that longitudinal play develops in the crank shaft with the result that the magnets and coils of the magneto 10 become relatively displaced, so that it is difficult to start the engine and the latter will not properly function when running in low speed or under a heavy load.

In order to compensate for this wear in the bearings, the present invention aims to provide means for adjusting the crank shaft longitudinally in accordance with the wear of said bearings so that proper relative positions of the magnets and coils may be maintained. To accomplish this there is interposed between the fan belt pulley 13 and the crank case 1 1 of the engine a thrust bearing 15. In the form of the invention shown in Figures 1 to 4t of the drawings this thrust bearing includes collars 16 having raceways in their opposed faces for the reception of anti-friction devices 17.

The pulley 13 is locked to the shaft 11 by means of a pin 18, the latter extending through the shaft and through slots 19 which extend longitudinally of the pulley hub 20. The ends of the pin 18 are tapped as at 21 for threaded engegement with bellshaped adjusting bolts 22, the latter extending through an opening provided in a bar 25 which is carried by spaced double bridge plates 24. The plates 24: overlap or bridge a slot 25 which is provided at diametrically opposite points in the pulley 18, the said slot extending inward and having a restricted portion 26 to provide shoulders 27, while the inner end of the slot termiders 27. Adjusting nuts 30 are mounted upon the outer ends of the bolts 22.

By adjusting the nuts 30, the pulley 13 and the thrust bearing 15 will be forced inward toward the adjacent end of the crank case 14, the bearing 15 engaging the case so that the shaft 11 will be drawn outward until proper adjustment is effected to properly position the-magnets with respect to the coils.

In the remaining figures of. the drawings, the construction is somewhat similar to that first described. The pulley 4-0 has its rear wall or partition 41 disposed a suitable distance from its outer end, there being integrally formed on the said wall 41 and surrounding an opening therein a hub l2 which extends from both sides of the wall or partition 41. The hub receives therein the outer straight end 4:3 of the crank shaft.

The pulley has its opposed faces provided with a round opening et-ft which also passes through the partition or wall 11. The openings-4% have restricted out ardly directed slots 45 enlarged at the outer face of the pulley to provide shoulders 16.

The bearing washers t7 and as are seated in the rear con'ipartment provided by the partition 4-1 in the pulley, the said washers having their confronting faces provided with annular grooves that form a raceway for anti-frictional balls 49. A pin 50, similar to the pin 18, is received through the openings at and passes through an opening in the shaft 4-3. The tapped interior threaded ends of the pin 50 are engaged by angle bolts 51, similarto those previously described. The bolts have their outer arms passing through the slots 45 and through the barrel of double bridge plates 52 also similar to those previously described. The outer arms of the angle bolts 51 have ar ranged thereon helical springs 53 which have their inner convolutions engaging the shoulders 46 and their outer convolutions engaging the partly closed outer end of the barrels of the bridge plates. The ends of the bolts are engaged by nuts 54 which, of course, contact with the bridge members 52. l Vith this construction, the thickness of the bearing washers may be increased and the pulleys materially strengthened.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as proper ly fall within the scope of the appended claims.

Having described the invention what is claimed is 1. A hearing adjuster of the character described comprising a fan pulley mounted upon the outer end of a crank shaft, said pulley having inwardly extending slots provided at dian'ietrically opposite points in the sides thereof and terminating in a substantially cylindrical portion, a pin extending from opposite sides of the crank shaft and through longitudinally extending slots in the pulley and having its end portions internally threaded, substantially L-shaped ad justing bolts threadedly received in the ends of the pins and positioned in the slots, spaced double bridge plates carrying a bar therebetween and receiving the outer ends of the adjusting bolts and engaging the side walls of the pulley, compression springs received on the adjusting bolts and journaled between the slots and double bridge plates, and a thrust bearing positioned on the crank shaft between the pulley and crank case, respectively.

2. A hearing adjuster of the character described comprising a fan pulley mounted upon the outer end of a crank shaft, said pulley having inwardly extending slots provided at diametrically opposite points in the sides thereof and terminating in a substantially cylindrical portion, a pin extending from opposite sides of the crank shaft and through longitudinally extending slots in the pulley and having its end portions internally threaded, substantially L-shaped adjusting bolts threadedly received in the ends of the pins and positioned in the slots, spaced double bridge plates carrying a. bar therebetween and receiving the outer ends of the adjusting bolts and engaging the side walls of the pulley, compression springs received on the adjusting bolts and journaled between the slots and double bridge plates, the pulley having its rear wall disposed inwardly from its outer end, a hub extending from the rear wall to receive the crank shaft, and a thrust bearing positioned within the hub, and inner periphery of the pulley adjacent the crank case.

In testimony whereof I afiix my signature.

JACKSON K. GREEK. 

